Add kaggle links to indexer

Author: joaquinvanschoren

openml_OS/libraries/ElasticSearch.php

@@ -1824,7 +1824,7 @@ public function index_single_dataset($id) {
       	$params['index'] = 'data';
       	$params['type'] = 'data';
         $status_sql_variable = 'IFNULL(`s`.`status`, \'' . $this->CI->config->item('default_dataset_status') . '\')';
-        $datasets = $this->db->query('select d.*, ' . $status_sql_variable . ' AS `status`, count(rid) as runs, GROUP_CONCAT(dp.error) as error_message from dataset d left join (SELECT `did`, MAX(`status`) AS `status` FROM `dataset_status` GROUP BY `did`) s ON s.did = d.did left join task_inputs t on (t.value=d.did and t.input="source_data") left join run r on (r.task_id=t.task_id) left join data_processed dp on (d.did=dp.did)' . ($id ? ' where d.did=' . $id : '') . ' group by d.did');
+        $datasets = $this->db->query('select d.*, ' . $status_sql_variable . ' AS `status`, count(rid) as runs, GROUP_CONCAT(dp.error) as error_message, GROUP_CONCAT(DISTINCT k.kaggle_link) as kaggle_link from dataset d left join (SELECT `did`, MAX(`status`) AS `status` FROM `dataset_status` GROUP BY `did`) s ON s.did = d.did left join task_inputs t on (t.value=d.did and t.input="source_data") left join run r on (r.task_id=t.task_id) left join data_processed dp on (d.did=dp.did) left join kaggle k on (d.did=k.dataset_id)' . ($id ? ' where d.did=' . $id : '') . ' group by d.did');
 
         if ($id and ! $datasets)
             return 'Error: data set ' . $id . ' is unknown';